Photoshop PSB to ICO Converter

PSB (Photoshop Big) is Photoshop's large document format. It works like PSD, with layers and effects, but allows images up to 300,000 pixels wide and files bigger than 2 GB.

You'll find PSB files in panoramas, large-format print, billboard design and high-resolution scans - anything too big for a regular PSD.

Adobe Photoshop opens PSB files. Few other apps do, and their size makes them hard to share, so converting to JPG, PNG or TIFF is the usual way to view or send the final image.

ICO is the icon format of Microsoft Windows and the classic format for website favicons - the little image in a browser tab. One ICO file can hold several sizes (16 × 16, 32 × 32, 48 × 48 and more), so the icon looks sharp everywhere.

ICO supports transparency, so icons can have rounded or irregular shapes. Modern sites often add PNG and SVG favicons too, but favicon.ico is still the universal fallback.

Windows shows ICO files in File Explorer and opens them in Photos; Mac Preview opens them too. GIMP and online editors can edit them. To make one, convert a square PNG - or use the Favicon Generator for a complete set.